Display system and printed matter

Abstract

To provide a writing board with which the labor for presenting information can be reduced.SOLUTION: A display system comprises: a display device provided with a monitor, and a printed matter having a light permeable base material and a print layer and disposed so as to cover the monitor; and a processor for controlling the display device. The printed matter functions as a writing board. When the power supply of the monitor is on, the printed matter passes light from the monitor through and causes the screen of the monitor to be displayed on the printed matter. When the power supply of the monitor is off, the printed matter hides the monitor by the print layer. When a read indication is received while the power supply is on, the processor reads content data corresponding to the read indication from a memory device, and displays the content data on the screen.SELECTED DRAWING: Figure 16

Description

[Technical Field]

[0001] One aspect of the present disclosure relates to a display system and a printed matter. [Background technology]

[0002] Patent Document 1 describes an electronic writing board system that allows multiple people to easily share information. This electronic writing board system includes an image display unit consisting of an existing flat surface in a predetermined space, an image projection unit capable of projecting an image onto the image display unit, an input detection unit that detects the content of handwritten input onto the image display unit, and an information sharing server that accumulates the input results from the input detection unit as electronic writing board information, reflects the electronic writing board information in an image, and outputs the image to the image projection unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-12499 Summary of the Invention [Problem to be solved by the invention]

[0004] There is a need for a writing board that reduces the effort required to present information. [Means for solving the problem]

[0005] A display system according to one aspect of the present disclosure comprises a display device having a monitor, a printed material having a translucent base material and a printing layer and arranged to cover the monitor, and a processor that controls the display device, wherein the printed material functions as a writing board, and when the monitor is turned on, the printed material transmits light from the monitor to display the monitor screen on the printed material, and when the monitor is turned off, the printed material conceals the monitor with the printing layer, and when the processor receives a read instruction while the power is on, it reads content data corresponding to the read instruction from a storage device and displays the content data on the screen.

[0006] In this aspect, when a read instruction is received while the monitor is powered on, content data corresponding to the read instruction is displayed on the printed matter that functions as a writing board. With this configuration, the content data is automatically displayed on the writing board, thereby realizing a writing board that reduces the effort required to present information. [Effects of the Invention]

[0007] According to one aspect of the present disclosure, a writing board that can reduce the effort required to present information can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view schematically showing a display device according to Example 1-1. [Figure 2] FIG. 2 is a cross-sectional view schematically showing a print layer included in the display device shown in FIG. [Figure 3] FIG. 3 is a cross-sectional view schematically showing a printed matter according to Example 1-2. [Figure 4] FIG. 4 is a cross-sectional view schematically showing a white pattern layer included in the printed matter shown in FIG. [Figure 5] FIG. 5 is a cross-sectional view schematically showing a printed matter according to Example 1-3. [Figure 6] FIG. 6 is a cross-sectional view schematically showing a printed matter according to Example 1-4. [Figure 7] FIG. 7 is a cross-sectional view schematically showing a print layer included in a display device according to Example 2-1. [Figure 8] FIG. 8 is a table showing the configuration of printed matter according to Experimental Examples 1 to 3. [Figure 9] FIG. 9 is a cross-sectional view schematically showing a print layer included in a display device according to Example 3-1. [Figure 10] FIG. 10(a) is a schematic diagram showing the color combinations of the printed layers, and FIG. 10(b) is a schematic diagram showing the color combinations of the printed layers according to a comparative example. [Figure 11] FIG. 11 is a schematic diagram showing a specific example of a color combination of the print layers. [Figure 12] FIG. 12 is a cross-sectional view schematically showing a print layer included in a display device according to Example 4-1. [Figure 13] FIG. 13(a) is a schematic diagram showing the color combinations of the printed layers, and FIG. 13(b) is a schematic diagram showing the color combinations of the printed layers according to a comparative example. [Figure 14] FIG. 14 is a schematic diagram showing a specific example of a color combination of the print layers. [Figure 15] Figure 15(a) is a view of the light source covered with printed matter viewed from the front side when the power of the light source 3 is OFF, and Figure 15(b) is a view of the light source covered with printed matter viewed from the front side when the power of the light source 3 is ON. [Figure 16] FIG. 16 is a diagram illustrating an example of the functional configuration of the display system. [Figure 17] FIG. 17 is a diagram showing an example of state transition of the display device. [Figure 18] FIG. 18 is a flowchart showing an example of processing by the display system. DETAILED DESCRIPTION OF THE INVENTION

[0009] Specific examples of display systems and printed materials according to embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. In the following description, identical elements in the drawings will be given the same reference numerals, and duplicate explanations will be omitted.

[0010] [About printed materials] First, examples of printed materials used in this embodiment will be described with reference to Figures 1 to 15. However, the contents described with reference to Figures 1 to 15 are merely examples of printed materials that can be employed in the present invention. Therefore, the layer structures of printed materials exemplified in the description with reference to Figures 1 to 15 do not limit the layer structures of printed materials employed in the present invention. Note that, in order to explain the printed materials, Figure 1 shows the printed materials incorporated into a display device.

[0011] [Example 1-1] FIG. 1 is a cross-sectional view schematically showing a display device according to Example 1-1. FIG. 2 is a cross-sectional view schematically showing a printed layer included in the display device shown in FIG. 1. As shown in FIG. 1, the display device 1 includes a printed material 2 and a light source 3. The printed material 2 is a sheet for expressing a pattern or a single color, and includes a light-transmitting substrate 4, a printed layer 5, and a transmissive smoke printed layer 30. The printed material 2 is provided in front of the light source 3 (between the viewer and the light source 3). The printed material 2 is fully transmissive to light. Therefore, when the light source 3 is powered on, the viewer can see the light from the light source 3 that has passed through the printed material 2, and when the light source 3 is powered off, the viewer can see the pattern or single color expressed by the printed material 2. The light source 3 is, for example, a display device (monitor).

[0012] The light-transmitting substrate 4 is a substrate that is transparent to visible light. The light-transmitting substrate 4 is made of, for example, a transparent resin. Examples of transparent resins include PET, PMMA, polycarbonate, polyethylene, polypropylene, and nylon. The light-transmitting substrate 4 may be a glass substrate. The thickness of the light-transmitting substrate 4 is, for example, 25 μm to 250 μm, but a substrate having a thickness less than or greater than this range can also be used as long as it is printable. In the case of a glass substrate, the thickness is, for example, about several mm to 10 mm. If necessary, a surface protection layer may be provided on the surface side of the light-transmitting substrate 4 (the side opposite to the printed layer 5).

[0013] The printing layer 5 is a layer that expresses a pattern or a single color of the printed matter 2. The printing layer 5 includes a first color pattern layer 10 provided on one surface 4a of the light-transmitting substrate 4, and a second color pattern layer 20 provided on the first color pattern layer 10.

[0014] The first color pattern layer 10 can be formed on the surface 4a by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 2, the first color pattern layer 10 is composed of a plurality of first color dots 11. Here, "dot" refers to a point that is an element constituting a printed image, and its shape is not limited to a circle but may be a rectangle, a polygon, or other shape. Each of the plurality of first color dots 11 contains a first color binder 12 and a plurality of first color pigment chips 13 dispersed within the first color binder 12. The content of the plurality of first color pigment chips 13 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, where the first color binder 12 is 100 parts by weight.

[0015] Examples of the first color binder 12 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, and polycarbonate resins. The thickness of the first color pattern layer 10 is, for example, 1 μm to 10 μm. The first color pattern layer 10 may contain a curing agent. In this case, the heat resistance of the first color pattern layer 10 and the adhesion of the first color pattern layer 10 to the light-transmitting substrate 4 can be improved. The first color pattern layer 10 may also contain a weathering agent. Known ultraviolet absorbers and light stabilizers can be used as the weathering agent.

[0016] In Example 1-1, the multiple first color pigment chips 13 are multiple color first interference pigments 14a, 14b that generate different interference light from each other. Each of the first interference pigments 14a, 14b is composed of a thin flake (not shown) that is transparent to visible light and a metal oxide film (not shown) that covers the flake. Light incident on the first color pattern layer 10 from the translucent substrate 4 side and reflected from the surface of the metal oxide film interferes with light that passes through the metal oxide film and is reflected from the surface of the flakes, generating interference light. Adjusting the film thickness and refractive index of the metal oxide film allows for generation of interference light with a desired wavelength.

[0017] In Example 1-1, each of the first interference pigments 14a and 14b is titanium dioxide-coated mica. The particle size range of the titanium dioxide-coated mica includes, for example, a range of 25 μm to 60 μm. Here, "particle size" refers to the longest diameter of the particle cross section. The flakes that make up the first interference pigments 14a and 14b may be made of materials other than mica, such as silica, alumina, glass, or polysilicate. The metal oxide films that make up the first interference pigments 14a and 14b may be made of materials other than titanium dioxide, such as zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0018] When incident light E enters the first color pattern layer 10, the first interference pigments 14a and 14b generate first interference light beams 15a and 15b, which are different from each other. That is, the wavelengths of the first interference light beams 15a and 15b are different from each other. As a result, the first interference pigments 14a and 14b exhibit a mixed color. The first interference pigments 14a and 14b are, for example, a red interference pigment (red pearl pigment) and a gold interference pigment (gold pearl pigment), respectively. In this case, the first interference light beams 15a and 15b exhibit red and gold, respectively. The blending amounts of the first interference pigments 14a and 14b may be the same or different from each other.

[0019] The second color pattern layer 20 can be formed on the first color pattern layer 10 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 2, the second color pattern layer 20 is composed of a plurality of second color dots 21. Here, "dot" refers to a point that is an element constituting a printed image, and its shape is not limited to a circle but may be a rectangle, a polygon, or other shape. Each of the plurality of second color dots 21 contains a second color binder 22 and a plurality of second color pigment chips 23 dispersed within the second color binder 22. The content of the plurality of second color pigment chips 23 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, where the second color binder 22 is 100 parts by weight.

[0020] Examples of the second color binder 22 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, and polycarbonate resins. The thickness of the second color pattern layer 20 is, for example, 1 μm to 10 μm. The second color pattern layer 20 may contain a curing agent. In this case, the heat resistance of the second color pattern layer 20 and the adhesion of the second color pattern layer 20 to the first color pattern layer 10 can be improved. The second color pattern layer 20 may also contain a weathering agent. Known ultraviolet absorbers and light stabilizers can be used as the weathering agent.

[0021] In Example 1-1, the multiple second color pigment chips 23 are second interference pigments 24 that generate monochromatic interference light different from the mixed color of the first interference pigments 14a and 14b. The second interference pigment 24 is composed of flakes (not shown) that are transparent to visible light and a metal oxide film (not shown) that covers the flakes. Light incident on the second color pattern layer 20 from the translucent substrate 4 side is reflected by the surface of the metal oxide film, and light that passes through the metal oxide film and is reflected by the surface of the flakes interferes with each other to generate interference light. Adjusting the film thickness and refractive index of the metal oxide film allows for the generation of interference light with a desired wavelength.

[0022] In Example 1-1, the second interference pigment 24 is titanium dioxide-coated mica. The particle size range of the titanium dioxide-coated mica includes, for example, a range of 25 μm to 60 μm. Here, "particle size" refers to the longest diameter of the particle cross section. The flakes that make up the second interference pigment 24 may be made of a material other than mica, such as silica, alumina, glass, or polysilicate. The metal oxide film that makes up the second interference pigment 24 may be made of a material other than titanium dioxide, such as zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0023] When incident light E enters the second color pattern layer 20, the second interference pigment 24 generates a monochromatic second interference light 25. As a result, the second interference pigment 24 exhibits a monochromatic color. The second interference pigment 24 may be any interference pigment that generates a monochromatic second interference light 25 different from the mixed color exhibited by the first interference pigments 14a and 14b, and may be, for example, a green interference pigment (green pearl pigment). In this case, the second interference light 25 exhibits green color.

[0024] The transparent smoke printed layer 30 has the function of attenuating light from the front side of the viewpoint that passes through the printed matter 2. The transparent smoke printed layer 30 is provided on the outermost surface of the printed layer 5, opposite the light-transmitting substrate 4. In Example 1-1, the transparent smoke printed layer 30 is provided on the second color pattern layer 20, as shown in FIG. 1. The transparent smoke printed layer 30 can be provided on the second color pattern layer 20 by, for example, screen printing, inkjet printing, gravure printing, or offset printing using an ink in which a small amount of carbon black is dispersed in a resin binder such as a vinyl, acrylic, urethane, or polyester binder. The thickness of the transparent smoke printed layer 30 is, for example, 1 μm to 10 μm. The transparent smoke printed layer 30 may contain a curing agent. In this case, the heat resistance of the transparent smoke printed layer 30 and the adhesion of the transparent smoke printed layer 30 to the second color pattern layer 20 can be improved. Furthermore, a weatherproofing agent may be contained in the transparent smoke printed layer 30. As the weatherproofing agent, known ultraviolet absorbers and light stabilizers can be used.

[0025] In the printed matter 2, the image is expressed by additively mixing the first interference light 15a, 15b generated by the first interference pigments 14a, 14b and the second interference light 25 generated by the second interference pigment 24.

[0026] The total light transmittance of the printed matter 2 is, for example, 30% to 70%. The total light transmittance here refers to a value measured using a spectrophotometer (for example, spectrophotometer UV-2100 manufactured by Shimadzu Corporation).

[0027] In the printed matter 2 according to Example 1-1 described above, the first color pattern layer 10 contains the first interference pigments 14a and 14b, and the second color pattern layer 20 contains the second interference pigment 24, making it possible to achieve a three-dimensional image even with a small number of printed layers. Furthermore, in the printed matter 2, the first color pattern layer 10 is the only pattern layer of the first color pattern layer 10 and the second color pattern layer 20 that contains an interference pigment that generates different interference light from each other, making it possible to simplify color matching and registration work during printing. Therefore, the printed matter 2 makes it possible to achieve a three-dimensional image even with a small number of printed layers, and also simplifies color matching and registration work during printing.

[0028] In Example 1-1, the printed matter 2 includes a transparent smoke print layer 30 provided on the second color pattern layer 20. This provides better color development between the first color pattern layer 10 and the second color pattern layer 20. Furthermore, because the transparent smoke print layer 30 is transparent, a decrease in the visibility of the image on the display device 1 is effectively suppressed.

[0029] In Example 1-1, the first interference pigments 14a, 14b and the second interference pigment 24 each contain titanium dioxide-coated mica with a particle size of 25 μm or more and 60 μm or less. When titanium dioxide-coated mica with a particle size of 25 μm or more is contained, the transparency and color development of the printed layer 5 can be improved. When titanium dioxide-coated mica with a particle size of 60 μm or less is contained, a decrease in the resolution and gradation of the printed layer 5 can be suppressed.

[0030] In Example 1-1, the content of the multiple first color pigment chips 13 is within a range of 0.5 parts by weight or more and 20 parts by weight or less, when the first color binder 12 is taken as 100 parts by weight, and the content of the multiple second color pigment chips 23 is within a range of 0.5 parts by weight or more and 20 parts by weight or less, when the second color binder is taken as 100 parts by weight. Because the content of the multiple first color pigment chips 13 is within a range of 0.5 parts by weight or more, the pattern of the first color pattern layer 10 is well expressed. Because the content of the multiple first color pigment chips 13 is within a range of 20 parts by weight or less, deterioration in the coating properties and transparency of the first color pattern layer 10 can be suppressed. Similarly, since the content of the multiple second color pigment chips 23 is within the range of 0.5 parts by weight to 20 parts by weight when the second color binder 22 is 100 parts by weight, the pattern of the second color pattern layer 20 is well expressed while preventing a decrease in the coating properties and transparency of the second color pattern layer 20.

[0031] In Example 1-1, the total light transmittance of the printed matter 2 is 30% to 70%. If the total light transmittance is 30% or more, when the printed matter 2 is placed in front of a screen, the light from the image on the screen makes it difficult to see the printed layer 5, and the image is more clearly visible. If the total light transmittance is 70% or less, the image on the printed layer 5 does not appear too dark even when the screen is black.

[0032] In Example 1-1, the display device 1 includes a printed matter 2 and a light source 3. With the display device 1, when the light source 3 is not lit, the pattern on the printed layer 5 is visible, and when the light source 3 is lit, the transmitted light from the light source 3 (pattern display, video display, etc.) is visible.

[0033] In Example 1-1, the light source 3 may be a display device. In this case, when the display is not lit, the pattern on the printing layer 5 is visible, and when the display is lit, transmitted light from the display (pattern display, video display, etc.) is visible.

[0034] As described above, the multiple interference pigments 14a, 14b, and 24 may contain pearl pigments. That is, the printed layer 5 may contain multiple interference pearl pigments (interference pigments 14a, 14b, and 24) that are different from one another. Therefore, the printed matter 2 is a printed matter 2 that includes a light-transmitting substrate 4 and a printed layer 5, and the printed layer 5 may contain multiple interference pearl pigments. This allows the printed layer 5 to create a three-dimensional appearance.

[0035] The printing layer 5 may include a first color pattern layer 10 containing an interference pearl pigment and a second color pattern layer 20 containing an interference pearl pigment, thereby enabling the printing layer 5 to achieve a more three-dimensional appearance.

[0036] Each of the first color pattern layer 10 and the second color pattern layer 20 may contain a plurality of interference pearl pigments, thereby enabling the print layer 5 to have a more three-dimensional appearance. For example, the second color pattern layer 20 may contain other interference pearl pigments in addition to the interference pigment 24.

[0037] The particle sizes of the plurality of interference pearl pigments may be different from one another. By including interference pearl pigments of different particle sizes in this way, a decrease in the transparency of the printed layer 5 is suppressed.

[0038] The particle diameter of the plurality of interference pearl pigments may be 25 μm or more and 60 μm or less. In this case, the color development of the pattern of the printed layer 5 can be improved. In addition, by suppressing an unnecessary decrease in the transparency of the printed layer 5, the visibility of the image on the display device can be improved when the display device is used.

[0039] The interference pearl pigment may contain titanium dioxide-coated mica. In this case, the wavelength of the interference light can be adjusted by adjusting the thickness of the titanium dioxide film. Furthermore, by increasing the smoothness of the mica surface, the brightness can be improved.

[0040] The effect of the print layer 5 containing a plurality of interference pearl pigments can be obtained not only in the first example but also in the second to sixth examples described later.

[0041] [Example 1-2] Below, a printed matter 2A according to Example 1-2 will be described with reference to Figures 3 and 4. Note that in the description of Example 1-2, descriptions that overlap with Example 1-1 above will be omitted, and only differences from Example 1-1 above will be described. In other words, to the extent technically possible, descriptions from Example 1-1 above may be used appropriately in Example 1-2.

[0042] Fig. 3 is a cross-sectional view schematically showing a printed matter according to Example 1-2. Fig. 4 is a cross-sectional view schematically showing a white pattern layer provided in the printed matter shown in Fig. 3. The printed matter 2A includes a light-transmitting substrate 4 and a printing layer 5. The printed matter 2A further includes a white pattern layer 40 provided on the second color pattern layer 20.

[0043] The white pattern layer 40 can be formed on the second color pattern layer 20 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 4 , the white pattern layer 40 is composed of a plurality of silver dots 41. Here, "dot" refers to a point that is an element constituting a printed image, and its shape is not limited to a circle, but may be a rectangle, a polygon, or other shape. Each of the plurality of silver dots 41 contains a silver binder 42 and a plurality of silver pigment chips 43 dispersed within the silver binder 42. The content of the plurality of silver pigment chips 43 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, where the silver binder 42 is 100 parts by weight.

[0044] Examples of the silver binder 42 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, and polycarbonate resins. The thickness of the white pattern layer 40 is, for example, 1 μm to 10 μm. The white pattern layer 40 may contain a curing agent. In this case, the heat resistance of the white pattern layer 40 and the adhesion of the white pattern layer 40 to the second color pattern layer 20 can be improved. The white pattern layer 40 may also contain a weathering agent. Known ultraviolet absorbers and light stabilizers can be used as the weathering agent.

[0045] The configuration of the printed matter 2A described above also achieves the same effects as in Example 1-1 above. Furthermore, Example 1-2 includes a white pattern layer 40 formed on the second color pattern layer 20 and composed of a plurality of silver dots 41, each of which contains a silver binder 42 and a plurality of silver pigment chips 43 dispersed within the silver binder 42. This provides excellent color development for the first color pattern layer 10 and the second color pattern layer 20, and allows the printed layer 5 to have a pattern that gives a whitish impression.

[0046] [Example 1-3] Below, a printed matter 2B according to Example 1-3 will be described with reference to Figure 5. Note that in the description of Example 1-3, descriptions that overlap with Examples 1-1 and 1-2 above will be omitted, and only differences from Examples 1-1 and 1-2 above will be described. In other words, to the extent technically possible, descriptions from Examples 1-1 and 1-2 above may be used appropriately in Example 1-3.

[0047] 5 is a cross-sectional view schematically showing a printed matter according to Example 1-3. The printed matter 2B includes a light-transmitting substrate 4 and a printed layer 5. That is, the printed matter 2B does not include a translucent smoke printed layer 30 or a white pattern layer 40. Even with the configuration of the printed matter 2B described above, the same effects as those of Example 1-1 can be achieved.

[0048] [Example 1-4] Below, a printed matter 2C according to Example 1-4 will be described with reference to Figure 6. Note that in the description of Example 1-4, descriptions that overlap with Examples 1-1, 1-2, and 1-3 above will be omitted, and only differences from Examples 1-1, 1-2, and 1-3 above will be described. In other words, to the extent technically possible, descriptions from Examples 1-1, 1-2, and 1-3 above may be used appropriately in Example 1-4.

[0049] 6 is a cross-sectional view schematically showing a printed matter according to Example 1-4. The printed matter 2C comprises a light-transmitting substrate 4, a printing layer 5, a white pattern layer 40, and a transmissive smoke printed layer 30. The white pattern layer 40 is provided on the second-color pattern layer 20, and the transmissive smoke printed layer 30 is provided on the white pattern layer 40. The configuration of the printed matter 2C described above also achieves the same effects as those of Examples 1-1, 1-2, and 1-3.

[0050] The display device and printed matter according to the present disclosure are not limited to the above-described examples, and various other modifications are possible. For example, the second color pattern layer may include first interference pigments of multiple colors that generate different first interference lights, and the first color pattern layer may include a second interference pigment that generates a single-color second interference light that is different from the mixed color exhibited by the multiple first interference pigments. Furthermore, while the above examples show that the first color pigment chips are first interference pigments of two colors, the first color pigment chips may be first interference pigments of three or more colors.

[0051] [Second example]

[0052] [Example 2-1] The printed matter and display device according to this example may have the same configuration as that shown in Fig. 1. Therefore, in the printed matter and display device according to this example, the description of the same configuration as that of the printed matter and display device of Example 1-1 will be omitted. The printed matter and display device according to Example 2-1 adopt the layer configuration shown in Fig. 7 instead of the layer configuration shown in Fig. 2.

[0053] The first interference pigment 14a includes a plurality of first titanium dioxide-coated micas 18a of a small particle size grade having a particle size range of 5 μm to 25 μm and a second titanium dioxide-coated mica 18b of a large particle size grade having a particle size range of 25 μm to 40 μm. The first interference pigment 14b includes a plurality of first titanium dioxide-coated micas 16a of a small particle size grade having a particle size range of 5 μm to 25 μm and a plurality of second titanium dioxide-coated micas 16b of a large particle size grade having a particle size range of 25 μm to 40 μm. The first titanium dioxide-coated micas 18a, 16a have an average particle size (D50) of, for example, about 15 μm, and the second titanium dioxide-coated micas 18b, 16b have an average particle size (D50) of, for example, about 25 μm. As a result, the average particle size of the first titanium dioxide-coated mica 18a, 16a is smaller than the average particle size of the second titanium dioxide-coated mica 18b, 16b. The second titanium dioxide-coated mica 18b, 16b may have a particle size range of 25 μm to 60 μm. In this case, the average particle size (D50) of the second titanium dioxide-coated mica 18b, 16b is, for example, approximately 35 μm. As shown in FIG. 7, each of the multiple first titanium dioxide-coated mica 18a, 16a is arranged so as to fill the gaps between the multiple second titanium dioxide-coated mica 18b, 16b. Here, "particle size" refers to the longest diameter of the particle cross section.

[0054] When incident light L enters the first color pattern layer 10, the first interference pigments 14a and 14b generate first interference lights 17a and 17b, which are different from each other. That is, the wavelengths of the first interference lights 17a and 17b are different from each other. As a result, the first interference pigments 14a and 14b exhibit a mixed color. The first interference pigments 14a and 14b may be, for example, a red interference pigment (red pearl pigment) and a gold interference pigment (gold pearl pigment), respectively. In this case, the first interference lights 17a and 17b exhibit red and gold, respectively. The first interference pigments 14a and 14b may be interference pigments of other colors. The blending amounts of the first interference pigments 14a and 14b may be the same or different from each other.

[0055] The second color pattern layer 20 may be the same as that shown in the first example.

[0056] The second interference pigment 24 includes a plurality of first titanium dioxide-coated micas 25a of a small particle size grade including a particle size range of 5 μm to 25 μm and a second titanium dioxide-coated mica 25b of a large particle size grade including a particle size range of 25 μm to 40 μm. The first titanium dioxide-coated micas 25a have an average particle size (D50) of, for example, about 15 μm, and the second titanium dioxide-coated micas 25b have an average particle size (D50) of, for example, about 25 μm. Thus, the average particle size of the first titanium dioxide-coated micas 25a is smaller than the average particle size of the second titanium dioxide-coated micas 25b. The second titanium dioxide-coated micas 25b may have a particle size range of 25 μm to 60 μm. In this case, the average particle size (D50) of the second titanium dioxide-coated micas 25b is, for example, about 35 μm. The plurality of first titanium dioxide-coated mica particles 25a are arranged so as to fill the gaps between the plurality of second titanium dioxide-coated mica particles 25b. Here, the "particle size" means the longest diameter of the cross section of the particle.

[0057] When incident light L enters the second color pattern layer 20, the second interference pigment 24 generates a single-color second interference light 26. As a result, the second interference pigment 24 exhibits a single color. The second interference pigment 24 may be any interference pigment that generates a single-color second interference light 26 different from the mixed color exhibited by the first interference pigments 14a and 14b, and may be, for example, a green interference pigment (green pearl pigment). In this case, the second interference light 26 exhibits green. The second interference pigment 24 may be an interference pigment of a color other than green.

[0058] The transparent smoke printed layer 30 is a layer for attenuating light transmitted through the printed matter 2. The transparent smoke printed layer 30 is provided on the outermost surface of the printed layer 5, opposite the light-transmitting substrate 4. In Example 2-1, the transparent smoke printed layer 30 is provided on the second color pattern layer 20, as shown in FIG. 1. The transparent smoke printed layer 30 can be provided on the second color pattern layer 20 by, for example, screen printing, inkjet printing, gravure printing, or offset printing using an ink in which a small amount of carbon black is dispersed in a resin binder such as a vinyl, acrylic, urethane, or polyester binder. The thickness of the transparent smoke printed layer 30 is, for example, 1 μm to 10 μm. The transparent smoke printed layer 30 may contain a curing agent. In this case, the heat resistance of the transparent smoke printed layer 30 and the adhesion of the transparent smoke printed layer 30 to the second color pattern layer 20 can be improved. Furthermore, a weatherproofing agent may be contained in the transparent smoke printed layer 30. As the weatherproofing agent, known ultraviolet absorbers and light stabilizers can be used.

[0059] In the printed matter 2, the image is expressed by additively mixing the first interference light 17a, 17b generated by the first interference pigments 14a, 14b and the second interference light 26 generated by the second interference pigment 24.

[0060] The total light transmittance of the printed matter 2 is, for example, 30% to 70%. The total light transmittance here refers to a value measured using a spectrophotometer (for example, spectrophotometer UV-2100 manufactured by Shimadzu Corporation).

[0061] In the printed matter 2 according to Example 2-1 described above, in the first color pattern layer 10, each of the plurality of first titanium dioxide-coated micas 18a, 16a having a small particle size range of 5 μm to 25 μm is arranged to fill the gaps between the plurality of second titanium dioxide-coated micas 18b, 16b having a large particle size range of 25 μm to 40 μm. In the printed matter 2, in the second color pattern layer 20, each of the plurality of first titanium dioxide-coated micas 25a having a small particle size range of 5 μm to 25 μm is arranged to fill the gaps between the plurality of second titanium dioxide-coated micas 25b having a large particle size range of 25 μm to 40 μm. Therefore, the printed matter 2 can provide a pattern with excellent visibility and color development. Furthermore, in the printed matter 2, the first color pattern layer 10 contains large particle size grade second titanium dioxide-coated mica 18b, 16b, and the second color pattern layer 20 contains large particle size grade second titanium dioxide-coated mica 25b, thereby suppressing a decrease in the transparency of the printed layer 5. Therefore, the printed matter 2 effectively suppresses a decrease in the visibility of images on the display device when the power is on.

[0062] In Example 2-1, the large particle size grade second titanium dioxide-coated mica 18b, 16b, 25b may have a particle size range of 25 μm to 60 μm. In this case, the color development of the pattern is more excellent. Furthermore, by suppressing an unnecessary decrease in the transparency of the printing layer 5, the visibility of the image on the display device 1 can be improved when the display device 1 is used.

[0063] In Example 2-1, the first interference pigments 14a, 14b, and the second interference pigment 24 are interference pigments containing titanium dioxide-coated mica. Therefore, by adjusting the thickness of the titanium dioxide film, the wavelength of the interference light can be adjusted. Furthermore, by increasing the smoothness of the mica surface, the perceived brightness can be improved.

[0064] In the second example, the configurations according to Examples 1-2 to 1-4 in the first example may also be adopted.

[0065] In the above examples, the first interference pigment and the second interference pigment each contained a plurality of first titanium dioxide-coated micas and a plurality of second titanium dioxide-coated micas. However, it is sufficient that at least one of the first interference pigment and the second interference pigment contains a plurality of first titanium dioxide-coated micas and a plurality of second titanium dioxide-coated micas. Furthermore, in the above examples, the first color pigment chips were first interference pigments of two colors. However, the first color pigment chips may be first interference pigments of three or more colors. Furthermore, first interference pigments of multiple colors may be mixed.

[0066] [Experimental Example] Here, experimental examples will be used to explain the tendency of the appearance of images and patterns on LCD monitors depending on the particle size of the titanium dioxide-coated mica contained in the printed layer. As shown in FIG. 8 and Experimental Examples 1 to 3 described below, printed matter was produced with the particle size of the titanium dioxide-coated mica adjusted. FIG. 8 is a diagram showing the configuration of the printed matter according to Experimental Examples 1 to 3. An LCD monitor was placed on the back side (transparent smoke printed layer side) of the printed matter according to Experimental Examples 1 to 3. The distance between the printed matter and the LCD monitor was 2 mm. The visibility (items 1 to 4 described below) of the LCD monitor when it was turned on and off was evaluated. Sensory evaluation was conducted by four people for items 1 to 4, and the average score was calculated.

[0067] <Experimental Example 1> A printed material was produced by sequentially providing a first-color pattern layer, a second-color pattern layer, a white pattern layer, and a transparent smoke print layer on a transparent PET substrate. In Experimental Example 1, the first-color pattern layer was formed by screen printing using an ink containing a first-color binder (urethane resin) and red and gold interference pigments dispersed within the first-color binder. The red and gold interference pigment contents were as follows, per 100 parts by weight of the first-color binder: 8 parts by weight of a red interference pigment having a particle size of 10 to 40 μm, 2 parts by weight of a red interference pigment having a particle size of 5 to 25 μm, 5 parts by weight of a gold interference pigment having a particle size of 10 to 60 μm, and 2 parts by weight of a gold interference pigment having a particle size of 5 to 25 μm.

[0068] In Experimental Example 1, a second color pattern layer was formed by screen printing using an ink containing a second color binder (urethane resin) and a green interference pigment dispersed within the second color binder. The green interference pigment content was 4 parts by weight of a green interference pigment with a particle size of 10 to 40 μm and 1 part by weight of a green interference pigment with a particle size of 5 to 25 μm, relative to 100 parts by weight of the second color binder. The red interference pigment, gold interference pigment, and green interference pigment were all titanium dioxide-coated mica.

[0069] In Experimental Example 1, a white pattern layer was formed by screen printing using an ink containing a silver binder (urethane resin) and silver pigment chips dispersed within the silver binder. The silver pigment chip content was 1 part by weight of silver pigment chips with particle sizes of 5 to 25 μm per 100 parts by weight of the silver binder. Furthermore, a transparent smoke print layer was formed by screen printing using an ink containing a medium ink and a black ink in a ratio of 40:1.

[0070] <Experimental Example 2> A printed material was produced by sequentially depositing a first-color pattern layer, a second-color pattern layer, a white pattern layer, and a transparent smoke print layer on a transparent PET substrate. In Experimental Example 2, the first-color pattern layer was formed by screen printing using an ink containing a first-color binder (urethane resin) and red and gold interference pigments dispersed within the first-color binder. The red and gold interference pigment contents were as follows, per 100 parts by weight of the first-color binder: 8 parts by weight of a red interference pigment having a particle size of 10 to 40 μm, 2 parts by weight of a red interference pigment having a particle size of 5 to 25 μm, 5 parts by weight of a gold interference pigment having a particle size of 10 to 60 μm, and 2 parts by weight of a gold interference pigment having a particle size of 5 to 25 μm.

[0071] In Experimental Example 2, a second color pattern layer was formed by screen printing using an ink containing a second color binder (urethane resin) and a green interference pigment dispersed within the second color binder. The content of the green interference pigment was 4 parts by weight, with a particle size of 10 to 40 μm, for every 100 parts by weight of the second color binder. The red interference pigment, gold interference pigment, and green interference pigment were all titanium dioxide-coated mica.

[0072] In Experimental Example 2, a white pattern layer was formed by screen printing using an ink containing a silver binder (urethane resin) and silver pigment chips dispersed within the silver binder. The silver pigment chip content was 1 part by weight of silver pigment chips with particle sizes of 5 to 25 μm per 100 parts by weight of the silver binder. Furthermore, a transparent smoke print layer was formed by screen printing using an ink containing a medium ink and a black ink in a ratio of 40:1.

[0073] <Experimental Example 3> A printed material was produced by sequentially depositing a first color pattern layer, a second color pattern layer, and a transparent smoke print layer on a transparent PET substrate. In Experimental Example 3, the first color pattern layer was formed by screen printing using an ink containing a first color binder (urethane resin) and a green interference pigment dispersed within the first color binder. The green interference pigment content was 4 parts by weight of a green interference pigment having a particle size of 10 to 40 μm and 1 part by weight of a green interference pigment having a particle size of 5 to 25 μm, relative to 100 parts by weight of the first color binder.

[0074] In Experimental Example 3, a second color pattern layer was formed by screen printing using an ink containing a second color binder (urethane resin) and red and gold interference pigments dispersed within the second color binder. The red and gold interference pigment contents were 8 parts by weight of red interference pigment with a particle size of 10 to 40 μm and 5 parts by weight of gold interference pigment with a particle size of 10 to 60 μm, relative to 100 parts by weight of the second color binder.

[0075] In Experimental Example 3, a transparent smoke print layer was formed by screen printing using a mixture of medium ink and black ink in a ratio of 40:1.

[0076] <Item 1: Clarity of displayed content> When the power of the LCD monitor was turned on, the clarity of the images and characters displayed on the LCD monitor was evaluated. <Score> 5 points: The image has little presence compared to the image and text displayed on the LCD monitor, and the image and text appear clear. 3 points: The image is somewhat strong compared to the image and text displayed on the LCD monitor, and the image appears to overlap the image and text slightly. 1 point: The image has a strong presence compared to the image and text displayed on the LCD monitor, and the image appears to overlap the image and text.

[0077] <Item 2: Brightness of the displayed content> When the power of the LCD monitor was turned on, the brightness of the images and characters displayed on the LCD monitor was evaluated. <Score> 5 points: Images and text displayed on the LCD monitor appear bright. 3 points: Images and text displayed on the LCD monitor appear slightly dark. 1 point: The image and text displayed on the LCD monitor appear quite dark.

[0078] <Item 3: Effects of black LCD monitors> The influence of the black LCD monitor on the image was evaluated when the LCD monitor was turned off. <Score> 5 points: There is no influence of the black color of the LCD monitor, and the image is clearly visible. 3 points: The influence of the black color of the LCD monitor is slightly noticeable, making the image appear slightly dark and muted (slightly high transparency). 1 point: The influence of the black color of the LCD monitor is evident, making the image appear quite dark and sunken (high transparency).

[0079] <Item 4: Color development of the pattern> The color development of the image was evaluated when the power of the LCD monitor was turned off. <Score> 5 points: The color of the pattern is good. 3 points: The color of the pattern is slightly weak and the color of the pattern appears pale (whitish). 1 point: The color of the pattern is weak and the color of the pattern appears white.

[0080] The results of the sensory evaluation of items 1 to 4 for Experimental Examples 1 to 3 are shown in Table 1 below. Any evaluation of 3 points or higher was deemed acceptable for practical use. Experimental Example 1 showed that the influence of the black LCD monitor on the image was fairly low, and the image visibility tended to be displayed at a sufficiently high level. High evaluation results were also obtained for the color development of the image and the clarity and brightness of the image and text display. Meanwhile, Experimental Examples 2 and 3 showed that the influence of the black LCD monitor on the image was kept low, while the color development of the image and the clarity and brightness of the image and text display tended to be generally good.

[0081] [Table 1]

[0082] [Third example]

[0083] [Example 3-1] The printed matter and display device according to this example may have the same configuration as that shown in Fig. 1. Therefore, in the printed matter and display device according to this example, the description of the same configuration as that of the printed matter and display device of Example 1-1 will be omitted. The printed matter and display device according to this example employ the layer configuration shown in Fig. 9 instead of the layer configuration shown in Fig. 2.

[0084] The first color pattern layer 10 can be formed on the surface 4a by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 9 , the first color pattern layer 10 is composed of a plurality of first color dots 11. Here, "dot" refers to a point that constitutes a printed image. The shape of the dot is not limited to a circle, and it can be a rectangle, a polygon, or other shape. Each of the plurality of first color dots 11 contains a first color binder 12 and a plurality of first color pigment chips 13 dispersed within the first color binder 12. The content of the plurality of first color pigment chips 13 is, for example, in the range of 0.5 to 20 parts by weight, assuming the first color binder 12 is 100 parts by weight. In this case, the image of the first color pattern layer 10 is well expressed, while the deterioration of the coating property and transparency of the first color pattern layer 10 can be suppressed.

[0085] In Example 3-1, the multiple first color pigment chips 13 are interference pigments 14 (first interference pigments) that generate monochromatic interference light of a predetermined color. The interference pigments 14 are composed of flakes (not shown) that are transparent to visible light and a metal oxide film (not shown) that covers the flakes. Light incident on the first color pattern layer 10 from the translucent substrate 4 side that is reflected on the surface of the metal oxide film interferes with light that passes through the metal oxide film and is reflected on the surface of the flakes, generating interference light. Adjusting the film thickness and refractive index of the metal oxide film allows for the generation of interference light having a desired wavelength.

[0086] When incident light E is incident on the first color pattern layer 10, monochromatic interference light 15 (first interference light) is generated from the interference pigment 14. As a result, the interference pigment 14 exhibits a monochromatic color.

[0087] The second color pattern layer 20 can be formed on the first color pattern layer 10 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 9 , the second color pattern layer 20 is composed of a plurality of second color dots 21. Here, "dot" refers to a point that constitutes a printed image. The shape of the dot is not limited to a circle, and it may be rectangular, polygonal, or other shapes. Each of the plurality of second color dots 21 contains a second color binder 22 and a plurality of second color pigment chips 23 dispersed within the second color binder 22. The content of the plurality of second color pigment chips 23 is, for example, in the range of 0.5 to 20 parts by weight, assuming the second color binder 22 is 100 parts by weight. This allows the image of the second color pattern layer 20 to be well expressed while preventing a decrease in the coating properties and transparency of the second color pattern layer 20.

[0088] When incident light E is incident on the second color pattern layer 20, the interference pigment 24 (second interference pigment) generates monochromatic interference light 25 (second interference light). As a result, the interference pigment 24 exhibits a monochromatic color. The interference pigment 24 may be any interference pigment that generates monochromatic interference light 25 that is different from the color exhibited by the interference pigment 14.

[0089] The total light transmittance of the printed matter 2 is, for example, 30% to 70%. The total light transmittance here refers to the value measured using a spectrophotometer (for example, a UV-2100 spectrophotometer manufactured by Shimadzu Corporation). If the total light transmittance is 30% or more, when the printed matter 2 is placed in front of a screen, the light from the image on the screen makes the printed layer 5 less visible, and the image is more clearly visible. If the total light transmittance is 70% or less, the image in the printed layer 5 does not appear too dark even when the screen is black.

[0090] Next, color combinations in the printed layer 5 will be described with reference to Fig. 10 and Fig. 11. Fig. 10(a) is a schematic diagram showing color combinations in the printed layer 5. Fig. 10(b) is a schematic diagram showing color combinations in the printed layer 105 according to a comparative example. Fig. 11 is a schematic diagram showing specific examples of color combinations in the printed layer 5.

[0091] As shown in FIG. 10(a), the first color pattern layer 10 contains an interference pigment of a single color "color A," thereby generating interference light of the single color "color A." The second color pattern layer 20 contains an interference pigment of a single color "color B," thereby generating interference light of the single color "color B." Color B is a different color from color A. Therefore, in the printed matter 2, the pattern is expressed by additively mixing the interference light of color A and the interference light of color B.

[0092] In the example shown in FIG. 11(a), "gold" is used as color A of the first color pattern layer 10, and "red" is used as color B of the second color pattern layer 20. The printed matter 2 may express a wood grain pattern as a design by additively mixing gold and red. The gold color of the first color pattern layer 10 can express a light wood grain. In this case, the interference pigment 14 shown in FIG. 9 is, for example, a gold interference pigment (gold pearl pigment). The interference light 15 represents gold. The interference pigment 24 is, for example, a red interference pigment (red pearl pigment). The interference light 25 represents red.

[0093] In the example shown in FIG. 11(b), "red" is used as color A of the first color pattern layer 10, and "gold" is used as color B of the second color pattern layer 20. The printed matter 2 may express a wood grain pattern as a design by additively mixing red and gold. By using red for the first color pattern layer 10, it is possible to express a wood grain pattern with a slightly reddish hue.

[0094] In the example shown in FIG. 11(c), "silver" is used as color A of the first color pattern layer 10, and "gold" is used as color B of the second color pattern layer 20. The printed matter 2 may express a hairline pattern as a design by additively mixing silver and gold. By making the second color pattern layer 20 gold, the usual stainless steel hairline can be adjusted to a gold tone. The interference pigment 14 shown in FIG. 9 is, for example, a silver interference pigment (silver pearl pigment). The interference light 15 indicates silver.

[0095] In the example shown in FIG. 11(d), "silver" is used as color A of the first color pattern layer 10, and "red" is used as color B of the second color pattern layer 20. The printed matter 2 may express a hairline pattern as a design by additively mixing silver and red. By using red for the second color pattern layer 20, the stainless steel hairline can be adjusted to a bronze tone.

[0096] In the example shown in FIG. 11(e), "gold" is used as color A of the first color pattern layer 10, and "silver" is used as color B of the second color pattern layer 20. The printed matter 2 may express a hairline pattern as a design by additively mixing gold and silver. By making the first color pattern layer 10 gold (or a color containing gold), a finish that further emphasizes the gold tone can be achieved.

[0097] In the printed matter 2 according to Example 3-1 described above, the first color pattern layer 10 contains an interference pigment 14 that generates a monochromatic interference light 15, and the second color pattern layer 20 contains an interference pigment 24 that generates a monochromatic interference light 25 that is different in color from the interference pigment 14. Here, as a comparative example, a printed matter 102 is shown in FIG. 10(b), in which the first color pattern layer 10 contains interference pigments of color X and color Y, and the second color pattern layer 20 contains an interference pigment of color Z. For example, to express a pattern such as that described in FIG. 11 using the configuration of the comparative example, it is necessary to adjust the three colors X, Y, and Z, which requires time-consuming color matching and registration during printing. On the other hand, for a pattern that can be expressed with a small number of colors, as in the printed matter 2 according to this example, by limiting the interference pigments contained in the first color pattern layer 10 and the second color pattern layer 20 to a single color, the pattern can be expressed using only the intensity of the single color. In this way, color matching and registration during printing can be simplified. Therefore, this printed matter 2 can simplify color matching and registration work during printing.

[0098] In the third example, the configurations according to Examples 1-2 to 1-4 in the first example may also be adopted.

[0099] [Example 4]

[0100] [Example 4-1] The printed matter and display device according to this example may have the same configuration as that shown in Fig. 1. Therefore, in the printed matter and display device according to this example, the description of the same configuration as that of the printed matter and display device of Example 1-1 will be omitted. The printed matter and display device according to this example employ the layer configuration shown in Fig. 12 instead of the layer configuration shown in Fig. 2.

[0101] The first color pattern layer 10 can be formed on the surface 4a by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 12, the first color pattern layer 10 is composed of a plurality of first color dots 11. Here, "dot" refers to a point that constitutes a printed image. The shape of the dot is not limited to a circle, and it can be a rectangle, a polygon, or other shape. Each of the plurality of first color dots 11 contains a first color binder 12 and a plurality of first color pigment chips 13 dispersed within the first color binder 12. The content of the plurality of first color pigment chips 13 is, for example, in the range of 0.5 to 20 parts by weight, assuming the first color binder 12 is 100 parts by weight. In this case, the image of the first color pattern layer 10 is well expressed, while the coating property and transparency of the first color pattern layer 10 are prevented from being deteriorated.

[0102] In Example 4-1, the multiple first color pigment chips 13 are interference pigments 14 (second interference pigments) that generate monochromatic interference light of a predetermined color. The interference pigments 14 are the same color as one of the interference pigments 24a and 24b (first interference pigments) described below. The interference pigments 14 are composed of flakes (not shown) that are transparent to visible light and a metal oxide film (not shown) that covers the flakes. Light incident on the first color pattern layer 10 from the translucent substrate 4 side is reflected by the surface of the metal oxide film, and light that passes through the metal oxide film and is reflected by the surface of the flakes interferes with each other to generate interference light. Adjusting the film thickness and refractive index of the metal oxide film allows for the generation of interference light with a desired wavelength.

[0103] When incident light E is incident on the first color pattern layer 10, monochromatic interference light 15 (second interference light) is generated from the interference pigment 14. As a result, the interference pigment 14 exhibits a monochromatic color.

[0104] The second color pattern layer 20 can be formed on the first color pattern layer 10 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 12 , the second color pattern layer 20 is composed of a plurality of second color dots 21. Here, the term "dot" refers to a point that constitutes a printed image. The shape of the dot is not limited to a circle, and it may be rectangular, polygonal, or other shapes. Each of the second color dots 21 contains a second color binder 22 and a plurality of second color pigment chips 23 dispersed within the second color binder 22. The content of the second color pigment chips 23 is, for example, in the range of 0.5 to 20 parts by weight, assuming the second color binder 22 is 100 parts by weight. This allows the image of the second color pattern layer 20 to be well-expressed while preventing a decrease in the coating properties and transparency of the second color pattern layer 20.

[0105] In Example 4-1, the multiple second color pigment chips 23 are interference pigments 24a, 24b of multiple colors that generate different interference light from each other. Each of the interference pigments 24a, 24b is composed of a thin flake (not shown) that is transparent to visible light and a metal oxide film (not shown) that covers the thin flake. Light incident on the second color pattern layer 20 from the translucent substrate 4 side that is reflected on the surface of the metal oxide film interferes with light that passes through the metal oxide film and is reflected on the surface of the flake, generating interference light. Adjusting the film thickness and refractive index of the metal oxide film allows generation of interference light with a desired wavelength.

[0106] In Example 4-1, the interference pigments 24a and 24b are titanium dioxide-coated mica. The particle size range of the titanium dioxide-coated mica includes, for example, a range of 25 μm to 60 μm. Here, "particle size" refers to the longest diameter of the particle cross section. The flakes that make up the interference pigments 24a and 24b may be made of materials other than mica, such as silica, alumina, glass, or polysilicate. The metal oxide films that make up the interference pigments 24a and 24b may be made of materials other than titanium dioxide, such as zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0107] When incident light E enters the second color pattern layer 20, the interference pigments 24a, 24b generate different interference lights 125a, 125b (first interference lights), respectively. That is, the wavelengths of the interference lights 125a, 125b are different from each other. As a result, the interference pigments 24a, 24b exhibit a mixed color. The blending amounts of the interference pigments 24a, 24b may be the same or different from each other. The interference pigment 24a may be an interference pigment that generates interference light 125a of the same single color as the single color exhibited by the interference pigment 14. Note that the interference pigment 24b may be an interference pigment that generates interference light 126b of the same single color as the single color exhibited by the interference pigment 14.

[0108] The total light transmittance of the printed matter 2 is, for example, 30% to 70%. The total light transmittance here refers to the value measured using a spectrophotometer (for example, a UV-2100 spectrophotometer manufactured by Shimadzu Corporation). If the total light transmittance is 30% or more, when the printed matter 2 is placed in front of a screen, the light from the image on the screen makes the printed layer 5 less visible, and the image is more clearly visible. If the total light transmittance is 70% or less, the image in the printed layer 5 does not appear too dark even when the screen is black.

[0109] Next, the color combinations in the printed layer 5 will be described with reference to Fig. 13 and Fig. 14. Fig. 13(a) and (b) are schematic diagrams showing the color combinations of the printed layer 5. Fig. 13(c) is a schematic diagram showing the color combinations of the printed layer 105 according to a comparative example. Fig. 14 is a schematic diagram showing specific examples of the color combinations of the printed layer 5.

[0110] As shown in FIG. 13(a), the first color pattern layer 10 contains an interference pigment of a single color "color A," thereby generating interference light of the single color "color A." The second color pattern layer 20 contains interference pigments of a single color "color A" and a single color "color B," thereby generating interference light of a mixture of "color A" and "color B." Color B is a different color from color A. Therefore, in the printed matter 2, the pattern is expressed by additively mixing the interference light of color A and the interference light of colors A and B.

[0111] Alternatively, as shown in FIG. 13(b), the second color pattern layer 20 contains an interference pigment of a single color "color A," thereby generating interference light of the single color "color A." The first color pattern layer 10 contains interference pigments of a single color "color A" and a single color "color B," thereby generating interference light of a mixture of "color A" and "color B." Color B is a different color from color A. Therefore, in the printed matter 2, the pattern is expressed by additively mixing the interference light of color A and the interference light of colors A and B.

[0112] In the example shown in FIG. 14(a), "gold" is used as color A of the first color pattern layer 10, and "gold" and "red" are used as color A and color B of the second color pattern layer 20, respectively. The printed matter 2 may express a wood grain pattern as a design by additively mixing gold and red. The gold color of the first color pattern layer 10 can express a light wood grain. In this case, the interference pigment 14 and interference pigment 24a shown in FIG. 12 are, for example, gold interference pigments (gold pearl pigments). The interference light 15 and interference light 125a represent gold. The interference pigment 24b is, for example, a red interference pigment (red pearl pigment). The interference light 126b represents red.

[0113] In the example shown in FIG. 14(b), "red" is used as color A of the first color pattern layer 10, and "red" and "gold" are used as color A and color B of the second color pattern layer 20. The printed matter 2 may express a wood grain pattern as a design by additively mixing red and gold. By using red for the first color pattern layer 10, it is possible to express a wood grain pattern with a slightly reddish tint.

[0114] In the example shown in FIG. 14(c), "silver" is used as color A of the first color pattern layer 10, and "silver" and "gold" are used as color A and color B of the second color pattern layer 20, respectively. The printed matter 2 may express a hairline pattern as a design by additively mixing silver and gold. By including gold in the second color pattern layer 20, the usual stainless steel hairline can be adjusted to a gold tone. The interference pigment 14 and interference pigment 24a shown in FIG. 12 are, for example, silver interference pigments (silver pearl pigments). The interference light 15 and interference light 126a indicate silver.

[0115] In the example shown in FIG. 14(d), "silver" is used as color A of the first color pattern layer 10, and "silver" and "red" are used as color A and color B of the second color pattern layer 20. The printed matter 2 may express a hairline pattern as a design by additively mixing silver and red. By including red in the second color pattern layer 20, the stainless steel hairline can be adjusted to a bronze tone.

[0116] In the example shown in FIG. 14(e), "silver" is used as color A and "gold" as color B of the first color pattern layer 10, and "silver" is used as color A of the second color pattern layer 20. The printed matter 2 may express a hairline pattern as a design by additively mixing gold and silver. By including gold (or a color containing gold) in the first color pattern layer 10, a finish that further emphasizes the gold tone can be achieved.

[0117] In the printed matter 2 according to Example 4-1 described above, either the first color pattern layer 10 or the second color pattern layer 20 contains interference pigments of multiple colors that generate interference light of different colors A and B, thereby achieving a three-dimensional image even with a small number of printed layers. Furthermore, in this printed matter 2, only one of the first color pattern layer 10 or the second color pattern layer 20 needs to contain the interference pigment that generates multiple interference light, thereby simplifying color matching and registration during printing. Meanwhile, the other of the first color pattern layer 10 or the second color pattern layer 20 contains an interference pigment that generates interference light of a single color, color A, that is the same as one of the multiple interference pigments. Here, as a comparative example, a printed matter 102 is shown in FIG. 13(c), in which the first color pattern layer 10 contains interference pigments of colors X and Y and the second color pattern layer 20 contains an interference pigment of color Z. For example, when creating a pattern like the one shown in Figure 14 using the comparative example configuration, it is necessary to adjust three colors, X, Y, and Z, which requires a lot of work for color matching and registration during printing. On the other hand, for patterns that can be created with a limited number of colors, such as those shown in Figure 14, the interference pigments in the first color pattern layer 10 and the second color pattern layer 20 can be limited to the same single color A, allowing the pattern to be created by varying the intensity of the single color A. Furthermore, when it is desired to emphasize the color A, using two layers, the first color pattern layer 10 and the second color pattern layer 20, makes it easier to adjust the color than adjusting it using only one color pattern layer. Furthermore, while adding too much interference pigment to one color pattern layer reduces the strength of the coating film, using two color pattern layers 10 and 20 can minimize this decrease in strength. As a result, color matching and registration during printing can be simplified.

[0118] In the fourth example, the configurations according to Examples 1-2 to 1-4 in the first example may also be adopted.

[0119] The printed matter and the display device are not limited to the above-described examples, and various other modifications are possible.

[0120] The printed matter may be a sheet in which a pattern layer and a concealing layer are laminated. The concealing layer is a layer that conceals the color of the display device when an image is not displayed, while transmitting the image when an image is displayed. The concealing layer is set to a predetermined range of visible light transmittance. An opening is formed in the concealing layer. The concealing layer may be printed using an inkjet device, for example, with a white ink containing titanium oxide. Specifically, the concealing layer may be printed, for example, in solid white, on the back of the pattern layer. An example of a printing method is an inkjet device, but is not limited to this. In addition to inkjet printing, various printing methods such as gravure printing, offset printing, letterpress printing, flexographic printing, screen printing, and electrostatic printing may be used to form the concealing layer. The printing method is not limited to the above-mentioned printing methods, and any conventionally known image forming method can be used, such as hand-drawing, ink-flowing, transfer printing, photography, electrophotography, photosensitive resin printing, vacuum deposition, chemical etching, thermal coloring, and discharge breakdown printing. The design layer is formed on the surface of the concealing layer using a printing method and is provided for the purpose of imparting design to the printed matter. The design layer may be applied to the entire surface as long as it has a certain degree of light transparency. Unlike the concealing layer, the design layer does not require the provision of openings, allowing for highly precise designs. Specifically, the design layer can be printed using an inkjet device, and the desired pattern may be printed using four colors of printing ink, for example, cyan, magenta, yellow, and black. Although an inkjet device has been exemplified as a method for printing the design layer, this is not limited thereto, and various printing methods can be applied, as with the concealing layer. The printed matter can adopt any known structure as long as it can exhibit the above-mentioned functions.

[0121] The concealment and visibility of the printed material 2 will be described in more detail with reference to FIG. 15 . Note that the description based on FIG. 15 is merely an example of a usage mode used to explain the properties of the printed material 2. Therefore, the present invention is not limited to this usage mode. FIGS. 15(a) and 15(b) are views of the front side of a light source 3 covered by the printed material 2. FIG. 15(a) shows the state when the light source 3 is turned off. FIG. 15(b) shows the state when the light source 3 is turned on. A wood grain pattern is used as the design of the printed material 2. A display device is used as the light source 3. The area of ​​the printed material 2 that covers the light source 3 is referred to as the display area DE. As shown in FIG. 15(a), when the light source 3 is turned off, the light source 3 is concealed by the design of the printed material 2. The printed material 2 conceals the light source 3 not with a light-blocking layer that blocks light, but with the light-transmitting design layer itself. Therefore, the visual information V1 displayed in the display area DE is the image of the printed matter 2. At this time, the viewer cannot see the display surface (black screen) of the light source 3 or the outline of the light source 3 from outside the printed matter 2. The visual information V1 visible in the display area DE and the visual information V2 visible in the area surrounding the display area DE are the same image of the printed matter 2. Therefore, the viewer cannot see the existence of the light source 3 from outside the printed matter 2.

[0122] As shown in FIG. 15(b), when the power supply of the light source 3 is ON, the light source 3 emits light and projects an arbitrary image GF onto the display surface. Here, the letter "X" printed on a monochrome background is used as the image GF. In the display area DE, the light of the image GF passes through the printed material 2. As a result, the viewer views the image GF by visually recognizing the transmitted light in the display area DE. Therefore, the visual information V3 displayed in the display area DE is the image GF projected by the light source 3. The content of the visual information V3 may include information not included in the content of the visual information V1. In this case, the visual information V3 may be composed only of light that has passed through the image of the printed material 2.

[0123] For example, as a comparative example, a sheet that displays the visual information "X" using a light source may be provided in which a portion of a light-shielding layer is cut out in the shape of an "X" to form a light-transmitting layer (different from the printed matter 2 of the present embodiment). Visual information V3 obtained using such a sheet and a light source such as a lamp has a background portion formed from a pattern on the surface of the light-shielding layer, and the "X" portion is formed from light from the light source that has passed through the light-transmitting layer. Another comparative example is a sheet in which a light-shielding layer in the shape of an "X" is formed on a portion of the light-transmitting layer. Visual information V3 obtained using such a sheet has a background portion formed from light from the light source that has passed through the light-transmitting layer, and the "X" portion is formed from a pattern on the surface of the light-shielding layer. In the comparative example, visual information V3 is provided by a combination of light that has passed through the sheet and light reflected from the surface of the sheet in the areas where the light is blocked. Furthermore, when a sheet such as the comparative example is used, the "X" shape is formed on the sheet itself in a manner that allows it to be seen even when the light source is turned off, so the visual information V1 also contains the content of "X." Therefore, the content of visual information V3 is already included in visual information V1.

[0124] Unlike a sheet using a light-shielding layer as in the comparative example, the visual information V3 in Fig. 15(b) using the printed matter 2 is entirely composed of light transmitted through the printed matter 2. Note that the entire printed matter 2 shown in Fig. 15 may be composed of a layer forming a light-transmitting pattern, or at least the entire display area DE may be composed of a layer forming a light-transmitting pattern. However, the printed matter 2 may also have a light-shielding layer provided in part of the display area DE, or a light-shielding layer provided in part of an area other than the display area DE.

[0125] Note that there are display devices that form a pattern in anticipation of the content of the image from the light source 3, and when the light source 3 is turned on, form visual information V3 by combining the pattern and the image. In the example shown in FIG. 15, the purpose is to make the presence of the light source 3 unrecognizable from the outside, so the visual information V3 in FIG. 15(b) differs from the visual information V3 formed by such a combination. However, depending on the brightness of the image and the color of a certain area, it is acceptable for the pattern to be faintly reflected in all or part of the visual information V3. Furthermore, for purposes different from those shown in FIG. 15, a combination of the pattern and the image of the printed material 2 may be used as visual information V3. Note that if a touch panel (touch screen) is used as the light source 3, the user operates the touch panel via the printed material 2. Therefore, the printed material 2 may be set to a thickness, material, and hardness that do not interfere with touch panel operation.

[0126] [Display System] As an application example of the display device 1, a display system according to the present disclosure will be described. The display system is a computer that provides a message board with a function to automatically display pre-prepared content. A message board is a user interface for accepting handwritten input, and the display system adds a function to automatically display content to the message board. This mechanism realizes a message board that reduces the effort required to present information. The display system can be installed in various locations. For example, the display system may be installed in educational facilities such as schools and cram schools, other public facilities such as stores, or homes. A user of the display system handwrites content to be communicated to others on the message board, and, as needed, pre-prepared content can be automatically displayed on the message board. For example, a teacher or lecturer can handwrite lecture-related information for students and easily present content that would be tedious to create by hand, such as maps, periodic tables, and complex shapes, through automatic display.

[0127] A display system is made up of one or more computers. When multiple computers are used, these computers are connected via a communication network such as the Internet or an intranet to logically construct a single display system.

[0128] A computer constituting a display system generally comprises a processor, memory, and a communication interface as hardware devices. The processor is, for example, a CPU, and the memory is composed of a flash memory, a hard disk, etc. Each function of the display system is realized by the processor executing a program stored in the memory. The computer may further comprise input devices such as a keyboard and a mouse, and output devices such as a monitor and speakers.

[0129] A display program for causing a computer to function as a display system includes program code for implementing each functional module of the display system. This display program may be provided in a state where it is non-temporarily recorded on a tangible recording medium, such as a CD-ROM, a DVD-ROM, or a semiconductor memory. Alternatively, the display program may be provided via a communications network as a data signal superimposed on a carrier wave. The provided display program is recorded in, for example, a memory.

[0130] An example of a display system according to the present disclosure will be described with reference to FIG. 16. FIG. 16 is a diagram showing the functional configuration of a display system 100 according to an example. In this example, the display system 100 includes a display device 110 that visually conveys handwritten or digitized information to people, and a display control device 120 that is a computer that controls the display device 110. The display device 110 and the display control device 120 are connected to each other so that data signals can be communicated. This connection may be a wired connection such as a communication cable, or a wireless connection such as Wi-Fi (registered trademark) or Bluetooth (registered trademark). The connection may be realized by a communication network including at least one of an intranet and the Internet.

[0131] The display device 110 is an example of the display device 1 described above. The display device 110 includes a monitor 111 and a printed material 112. The monitor 111 is an example of the light source 3. The printed material 112 corresponds to the printed material 2 described above. Therefore, the printed material 112 has a light-transmitting substrate 4 and a printing layer 5, and is provided so as to cover the monitor 111. The image or color represented by the printing layer 5 may be designed to be suitable for a writing board, for example, to imitate a whiteboard or blackboard. The surface protective layer of the light-transmitting substrate 4 is treated to be resistant to writing with a marker and erasure with an eraser. Alternatively, a writing layer that can be written on with a water-based magic marker may be provided on the light-transmitting substrate 4 (on the surface side of the light-transmitting substrate 4). Examples of the marker and eraser include a whiteboard marker and a whiteboard eraser. For example, a coating of transparent acrylic resin or the like may be formed as the surface protective layer. The printed material 112 configured in this manner functions as a writing board.

[0132] The display control device 120 includes a processor 121 that controls the display device 110 and a memory 122 that is a storage device that stores content data that can be displayed on the display device 110. In one example, the processor 121 functions as a reception unit 131, an extraction unit 132, and a display control unit 133. The reception unit 131 is a functional module that receives various data based on input via an input device such as a keyboard or a mouse. For example, the reception unit 131 receives instruction data that indicates an instruction for controlling the display system 100. An example of the instruction data is a read instruction for reading content data previously stored in the memory 122. The read content data is displayed on the screen of the monitor 111. Another example of the instruction data is an erase instruction for erasing content data displayed based on the read instruction from the screen of the monitor 111. The extraction unit 132 is a functional module that reads content data from the memory 122 based on the read instruction. The display control unit 133 is a functional module that controls the screen on the monitor 111 when the power is turned on. For example, the display control unit 133 displays the content data read by the extraction unit 132 on the screen, and erases the content data from the screen based on an instruction to erase.

[0133] The content data pre-stored in memory 122 may be determined depending on the intended use of display system 100. For example, the content data may be various types of content data such as educational content, conference content, advertisements, news, etc. In one example, memory 122 stores one or more data records in which the content data is associated with a content ID, which is an identifier that uniquely identifies the content data.

[0134] The operation of the display device 110 will be described with reference to Fig. 17. Fig. 17 is a diagram showing an example of state transitions of the display device 110. In this example, the display device 110 is installed so as to be embedded in a wall 190 of a classroom, and the picture or single color of the printing layer 5 of the printed material 112 is designed to represent a whiteboard. The teacher can write on the printed material 112 with a marker and erase the writing with an eraser, just like when using a whiteboard.

[0135] When the power supply of the monitor 111 is off, the display device 110 is in state ST1. State ST1 shows a scene in which a teacher has handwritten a note 150 on the printed material 112 with a marker. In this case, the printed material 112 conceals the monitor 111 with the pattern or monochrome color of the printing layer 5. Therefore, observers such as teachers and students cannot see the monitor 111.

[0136] When the power of the monitor 111 is turned on, the display device 110 transitions to state ST2. In this case, the printed matter 112 transmits light from the monitor 111, causing the screen 111a of the monitor 111 to be displayed on the printed matter 112. As a result, the observer can view the screen 111a. The memo 150 written on the printed matter 112 is not affected by the display on the screen 111a.

[0137] When the content data is read from the memory 122 and displayed on the screen 111a, the display device 110 transitions to state ST3. State ST3 shows a scene in which the teacher operates the display system 100 to display a world map 160 on the screen 111a as additional information. The world map 160 is an example of educational content data. The world map 160 is displayed together with the memo 150.

[0138] When the displayed content data is erased, the display device 110 transitions to state ST2.

[0139] When the power of the monitor 111 in state ST3 is turned off and the monitor 111 transitions to state ST1, and then the power is turned on, the display control unit 133 may transition the monitor 111 to either state ST2 or state ST3. In other words, the display control unit 133 may or may not re-display the content data that was displayed when the power was last turned off.

[0140] The state of the display device 110 transitions among states ST1, ST2, and ST3 depending on whether the power of the monitor 111 is on or off and whether content data is displayed. With such a configuration of the display device 110, the user can write by hand on the printed matter 112 that functions as a writing board, and can instantly display pre-prepared content data as needed, thereby efficiently conveying information to others.

[0141] An example of processing by display system 100 will be described below, along with an example of a display control method according to the present disclosure, with reference to Fig. 18. Fig. 18 is a flowchart showing this example as processing flow S1. Display system 100 executes processing flow S1 while monitor 111 is powered on.

[0142] As shown in step S11, the display system 100 performs subsequent processing according to the type of input accepted by the accepting unit 131 while the monitor 111 is powered on (i.e., while the screen of the monitor 111 is displayed on the printed material 112).

[0143] If the receiving unit 131 receives a read instruction ("Read instruction" in step S11), the process proceeds to step S12. In step S12, the extraction unit 132 reads content data from the memory 122 based on the read instruction, and the display control unit 133 displays the content data on the screen of the monitor 111. In one example, the read instruction includes a specified content ID. In this case, the extraction unit 132 reads content data associated with the content ID from the memory 122, and the display control unit 133 displays the content data on the screen.

[0144] If the receiving unit 131 receives a delete instruction ("delete instruction" in step S11), the process proceeds to step S13. In step S13, the display control unit 133 deletes the displayed content data from the screen based on the delete instruction.

[0145] The display system 100 can repeatedly execute the process flow S1 while the power of the monitor 111 is on. The user can write any information by hand on the display device 110 (printed material 112) while the content data is automatically displayed or erased as needed.

[0146] As described above, the display system 100 makes the monitor 111 visible when the monitor 111 is used, and hides the monitor 111 when the monitor 111 is not used. The display system 100 displays or erases content data on the screen of the monitor 111 in response to a read instruction or an erase instruction while the power of the monitor 111 is on. Therefore, the user can easily display content without having to write the content themselves, which is time-consuming to write or draw.

[0147] The display system according to the present disclosure is not limited to the above example, and various modifications are possible to the display system without departing from the spirit of the present disclosure.

[0148] Monitor 111 may be a touch screen that can accept touch input by a person's finger, a stylus pen, or the like. In this case, acceptance unit 131 may accept content data corresponding to touch input accepted by a powered-on touch screen, and display control unit 133 may display the content data on the screen of the touch screen. In one example, the touch input is handwritten input made by a person's finger, a stylus pen, or the like. In this example, acceptance unit 131 accepts handwritten data represented by the handwriting of the handwritten input, and display control unit 133 displays the handwritten data on the screen.

[0149] The display system does not need to have a function for erasing content data from the screen based on an erasure instruction.

[0150] The control for turning the power of the monitor 111 on or off may be realized by a physical component such as a switch, or may be realized by electronic control by the display control device 120 (e.g., the display control unit 133).

[0151] The processing steps of the method executed by at least one processor are not limited to the above examples. For example, some of the above steps may be omitted, or the steps may be executed in a different order. Furthermore, any two or more of the above steps may be combined, or some of the steps may be modified or deleted. Alternatively, other steps may be executed in addition to the above steps.

[0152] In this disclosure, the expression "at least one processor executes a first process, executes a second process, ... executes an nth process" or a corresponding expression indicates a concept including a case where the entity executing the n processes from the first process to the nth process, i.e., the processor, changes midway through. In other words, this expression indicates a concept including both a case where all n processes are executed by the same processor and a case where the processor changes among the n processes according to an arbitrary policy.

[0153] [Note] As can be seen from the various examples above, the present disclosure includes the following aspects. (Appendix 1) a display device including a monitor and a printed matter having a light-transmitting base material and a printing layer and provided so as to cover the monitor; a processor for controlling the display device; Equipped with The printed matter functions as a writing board; When the power supply of the monitor is on, the printed matter transmits light from the monitor, and the screen of the monitor is displayed on the printed matter; When the power supply of the monitor is off, the printed matter conceals the monitor with the printed layer; when the processor receives a read instruction while the power is on, it reads content data corresponding to the read instruction from the storage device and displays the content data on the screen; Display system. (Appendix 2) when the processor receives a deletion instruction while the power is on, the processor deletes the displayed content data from the screen. 10. A display system as described in Appendix 1. (Appendix 3) the monitor is a touch screen; 3. A display system according to claim 1 or 2. (Appendix 4) The content data is educational content data. A display system according to any one of appendices 1 to 3. (Appendix 5) A light-transmitting substrate and a printing layer are provided, It is designed to cover the monitor, When the power supply of the monitor is on, the light from the monitor is transmitted to display the screen of the monitor; When the power supply of the monitor is off, the monitor is concealed by the printed layer. printed matter. (Appendix 6) A writing layer is provided on the light-transmitting substrate. Printed matter as described in Appendix 5.

[0154] According to Supplementary Notes 1 and 5, when a read instruction is received while the monitor is powered on, content data corresponding to the read instruction is displayed on the printed matter functioning as a writing board. With this configuration, content data is automatically displayed on the writing board, thereby realizing a writing board that reduces the effort required to present information.

[0155] According to Supplementary Note 2, the displayed content data is erased from the screen based on the erasure instruction. This mechanism allows the user to display the content data only when necessary. This can lead to improved convenience of the display system.

[0156] According to Appendix 3, the adoption of a touch screen makes it possible to transmit information in a rich manner through three types of expression: writing on a printed matter as a writing board, handwriting input on the touch screen, and content data read from a storage device.

[0157] According to Appendix 4, educational content is automatically displayed based on the read command. Educational content is often tedious to create by hand, such as maps, periodic tables, and complex shapes. By automatically displaying such educational content, it is possible to reduce the effort required to present information in educational settings.

[0158] According to Supplementary Note 6, by providing a writing layer, it is possible to provide a writing board that is more suitable for writing. [Explanation of symbols]

[0159] 1,110...display device, 2,112...printed material, 3...light source, 100...display system, 111...monitor, 111a...screen, 120...display control device, 131...reception unit, 132...extraction unit, 133...display control unit.

Claims

1. a display device including a monitor and a printed matter having a light-transmitting base material and a printing layer and provided so as to cover the monitor; a processor for controlling the display device; Equipped with The printed matter functions as a writing board; When the power supply of the monitor is on, the printed matter transmits light from the monitor, and the screen of the monitor is displayed on the printed matter; When the power supply of the monitor is off, the printed matter conceals the monitor with the printed layer; when the processor receives a read instruction while the power is on, it reads content data corresponding to the read instruction from the storage device and displays the content data on the screen; Display system.

2. when the processor receives a deletion instruction while the power is on, the processor deletes the displayed content data from the screen. The display system of claim 1 .

3. the monitor is a touch screen; 3. A display system according to claim 1 or 2.

4. The content data is educational content data.

3. A display system according to claim 1 or 2.

5. A light-transmitting substrate and a printing layer are provided, It is designed to cover the monitor, When the power supply of the monitor is on, the light from the monitor is transmitted to display the screen of the monitor; When the power supply of the monitor is off, the monitor is concealed by the printed layer. printed matter.

6. A writing layer is provided on the light-transmitting substrate. The printed matter according to claim 5.

Images